The earth in space
- 4. Contents 1. Geography 2. Citizenship 3. History 4. Culture & Society
- 5. •Can you name living beings? Plants, humans , animals, insects. •When can you see the stars on the sky? At night
- 6. The Earth in Space Presented by: Miss Sobia
- 7. Learning Objectives After completing this chapter students may be able to:- Explain the concepts of:- • The shape of the Earth • The Earth’s movements and its effect. • locate the position of the Earth in space. • define key terms such as orbit, axis, equator, and hemisphere.
- 8. Introduction
- 9. Where does the planet Earth was according to the people in old times? Most of the people in old times believed that the Earth was at the centre of the Universe. • The sun and other planets moved around the Earth.
- 10. COMMUNICATIONS ANTENNAS On-board the Hubble telescope are two identical S-Band transmitters. In 1998 one of the transmitters failed, however the secondary transmitter has kept up with the extra load by rotating the telescope to maintain communication. The radio waves converted from the solid-state recording system are sent to a NASA communication satellite, which in- turn relays the information to Earth. • Can you tell the name of the thing shown in this picture? Satellite.
- 11. •Orbit:- The orbit is the name of the path on which Earth or any other planet revolves around sun. Earth & its Movements
- 13. What is the movement of Earth around sun called? Revolution What is the name of imaginary line that joins the North and South Pole through the center of the Earth ? Axis
- 14. Effects of Rotation and Revolution •Rotation cause day and night. •Revolution Cause different seasons. Tell the names of the seasons? Summer, winter, autumn, spring.
- 16. • What divides the Earth into northern and southern hemisphere? Equator • What causes day and night? Rotation • What is the shape of the Earth? A Sphere
- 17. APERTURE DOOR • The adaptive optics on the Hubble telescope allow it to conduct high- resolution optical visualization over a wide field of view. The aperture door itself can be closed if needed, to prevent light from external sources from entering the telescope.